sk_X509_ATTRIBUTE_new_null
env->unprotectedAttrs = sk_X509_ATTRIBUTE_new_null();
si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
if ((*sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL) {
rinf->attributes = sk_X509_ATTRIBUTE_new_null();